Power pump unit



March 21, 1939.

v. 1. ANDREW POWER PUMP UNIT Filed Feb. 9, 1938 BY EENTQR.

' ATTORNEY.

7 March 21, 1939. v ANDREW v I 2,151,067

POWER PUMP UNIT Filedfeb. 9, 1938 I 2 Sheets-Sheet 2 M Y INVENTOR.

ATTORNEY.

. UNITED STATES Patented Mar. 21, 1939 PATENT OFFICE POWER PUMP UNITVaughan L. Andrew, Superior, Wis. "Application February 9, 1938, SerialNo. 189,626

6 Claims.

"is the compacting of the two ends of the pump,

' of the pump are separated and which is substantially'universal in thistype of unit.

Still another object is to make more readily 7 available those parts ofsuch a unit which may need attention from time to time.

A further object is to provide such a unit wherein any leakage from thewater end of the pump is positively prevented from in any wayinterfering with the power end thereof, or vice versa. I

. Still other objects and advantages of the invention will appear in thefollowing description thereof.

' Referring now to theaccompanying drawings, forming part of thisapplication, and wherein like reference characters indicatelike parts:

Figure 1 is a vertical central sectional view through one of the pumpunits, except that the upper portion of the section is offset from thecenter to illustrate the two intake water valves, onein section and theother in'elevatiomother portionsof the unit also being shown inelevation,

\Figure 2 is a horizontal section on the line 2-2,

] Figure 1, the crank pin-being'shown in horizontal position. c

Figure 3 is a horizontal sectionon the line 3 3, Figure -1, with thecover'of the power end removed, and the crank pin 22 shown in horizontalposi- -tion;,'

It is well known that in units of this type, driveneitherby an electricmotor as here illustratedor a gasolene motor, trouble is experienced inkeeping the stuffing glands'of such a unit properlyadjusted,and that,especially after some considerable time of, use, and in such units wherethe power end is spaced from the pumping end with the piston exposedintermediate of the extrem- :ities of the unit as is common, water fromthe pumping end will follow the piston into the gland of thepoweren'd,pcausing interference with the normal functioning of the unit, theelimination of which it will appear I have accomplishedin the I novelassembly here illustrated,

In the embodiment here illustrated I have shown at I the principalsupporting housing, which is preferably of a single castingsubstantially rectangular in shape, though somewhat elongated, the powerend embodying the chamber 5 2 and the pumping end the chambers 33, therebeing preferably a larger chamber 4 substantially the entire size of theinterior of the housing beneath these chambers 2 and 33, separatedtherefrom as by the stepped floor or partition 5. 10 Intermediate of thechambers 2 and 3-3 is the vertical division wall 6 which is shown as acontinuation of the floor 1 extending longitudinally and centrally ofthe bottom of the chambers 33 and providing the integral dependingsleeve-like support '1 for the power pitman 8. The floor I has a centralupstanding integral portion 9 forming the pumping cylinder, the samebeing a portionof the division wall intermediate of the chambers 33,though preferably lined as with the 0 brass or other sleeve l0, and inwhich the pumping piston I I is horizontally reciprocated as by thepiston rod I 2. This latter extends through its stufiing box 13outwardly through the end wall of the housing and is rigidly connectedas by the coupling M to the similar outwardly extending end of the powerpitman 8, so that these two members are in perfect parallel alignmentand operate in unison. By this construction it is noted that thenecessity of a stuffing gland for the pitman 8 is eliminated, and thepeculiarity of this construction will be described later.

The power chamber 2 of the housing is preferably provided with aremovable covering member l5 which is held in place by any desirednumber of tap or other bolts I6 through the various holes 11 in thehousing, and the housing has extending laterally therefrom the sleeve orwrist-like journal 18, formed integral with the housing and alsoextending inwardly as well as outwardly therefrom. Within thisjournal ismounted the hollow wrist pin IQ of the driving pulley 20 formedintegrally therewith, and the inner end of the wrist pin 59 is solid asat 2| and has fixed therein the driving or crank pintle 22,eccentrically thereof, and which pintle carries the crank arm 23 of thepower unit which is pivoted as at 24 to the reduced end, 25 of thepitman 8, thus forming a direct connection from the pumping piston II tothe wrist pin Hi. This latter, upon its inner end, is provided with acircular covering plate 26 held in position against the pin by asuitable tap bolt 21, and, just inwardly of the union of the web of thepulley 20 with the wrist pin Hi, the latter is provided withacircumferential bead indicated at 28 for engagement with the innersurface or shoulder of the annular groove 29, about the interior of theouter terminus of the sleeve l8.

The bead 28 functions as a thrust bearing for the wrist pin, and justoutwardly of this bearing is installed a suitable oil stop 30 to preventany possible leakage of lubrication from the bearing.

The outer open end of the wrist pin l9 may be 7 known in the art as aV-belt, but in this instance only the smaller pulley of the motor isrequired to be of V -shape. V, t V

The water end of the unit is of the usual four valve double acting typecommon in the art, and

the valves of which are indicated at 34 operating alternately in pairsas the piston H is reciprocated, two being closed while the other twoare open, and vice versa in respect to the discharge of water from thechambers 33 through the discharge opening 35, the intake opening of thepump being indicated at 36. The arrangement of the valves 34 in thisinstance is such that all four of said valves are installed from aboveand into the upper wall of the chambers 3-3 or pump head of the unit,they being covered by the removable air chamber 31 which is held inplace by a suitable through bolt 38, as is common.

It is to be noted that the stufling box l3 about the pump piston I2 isintegral with the stuffing box 40 surrounding the pitman 8 and that theytogether form a covering member for, the two openings 4| and 42 into thepump end of the housing, and also that this covering member is held inposition by any number of tap bolts such as indicated at 43, it beingfound only necessary to cover the stuffing box 40 about the pitman 8with a cap 44 and suitable gasket 45 held thereby, this being sufiicientfor prevention of any oil being carried out of the housing by the pitman8,

, While the stufiing box about the pump piston rod I2 is shown asprovided with a common stufiing gland and packing controlled by a novelform of pressure device 46, which is spring controlled to insure uniformpressureupon the gland.

' Thus it is seen that by the removal of the coupling member I 4, whichrigidly carries the end of the pumping piston rod 12 and is fixed to Afurther novel feature of this assembly is that V 1 porting housing uponand within one end'of the sleeve like member I forming the guide andholder of the pitman 8 is divided into three bearing portions with openspaces intermediate of ample room for drippage of surplus oil beingcarried by the rod during its reciprocal action,

and yet permitting same to utilize ample of the oil for necessarylubrication,

Furthermore it is to be noted that the cover member l5 for the power endof the unit is provided with oil dripping fins 41 and 48 dependingtherefrom, and which fins. convey oilsplashed thereupon by the operationof the device onto both bearings of the crank arm 23, and that the disc26 has formed thereon opposite laterally projecting angular. wings 49for the purpose of carrying oil from the bottom of the chamber 2 aboutand splashing it promiscuously within said chamber to insure amplesupply for the various parts thereof. r

The drippage of oil from the sleeve-like support I is conveyedby'gravity'upon the inclined bottom 50 back to the chamber 2, as clearlyillustrated so that circulation of oil is constantly taking place duringthe operation of the device, and is adequate for long time lubrication,which is so essential in such a unit.

Having thus described my invention, what I pitman for transmittingenergy from the power end of said housing to the pumping mechanism atthe other end slidably supported beneath said pumping mechanism andconnected thereto externally of said housing, and an oil chamber commonto said means and to all of the moving parts of the power elementswithin said housing. 2. In a pumping power unit, a supporting housing, apower supply shaft transverse one end of said housing, a pump and valvestherefor in the opposite end of the housing and means including ahorizontally slidable pitman operable beneath saidpumping mechanism fortransmitting energy thereto from said power shaft, and an oil chambercommon to said means and said power supply shaft.

3. In a pumping power unit a supporting housing, a motor mounted uponone end of said housing, a combined water and air chamber mounted uponthe opposite end of said housing, a power transmitting shaft extendingWithin said housing beneath said motor and driven thereby, a reciprocalsliding pitman extending through the opposite end of said housing forconveying power from said shaft to outwardly of said housing, and areciprocal pumping piston installed intermediate of said'chamber andsaid pitman and rigidly connected to the latter externally of saidhousing.

4. A combined reciprocal piston pump and power unit including asupporting housing having an oil containing chamber therein, a powershaft extending within said chamber adjacent one end thereof, a slidablepitman within said chamber operated by said power shaft and extendingthrough the opposite end of said chamber, and

means for rigidly connecting said pump piston and pitman externally ofsaid housing.

5. A pumping power unit comprising a supwhich the power supplyingelements are supported and pumping mechanism upon and within theopposite end, characterized by means including a single horizontallyreciprocal pitman supported within said housing beneath said pumpingmechanism for transmitting energy from the power end of said housing tothe pump-' ing mechanism and connected thereto externally of saidhousing, there being an oil chamber common to said means and all of themoving parts of the power elements withinsaid housing, 7

6. A combined pump and power unit comprising an elongated housing, powersupplying elements at one end of said housing, pumping mechanism at theother end of said housing, said mechanism including a piston rod foroperating same 'pumping mechanism, a slidable pitman beneath the pumpingmechanism and connected with said piston rod for transmitting power fromsaid

